ConTesA (v. 3.5.1)
The Conformance Testing Assistant, or ConTesA, is a program for validating XML Instances against the business rules of known specifications. Complex standards often contain business rules, and ConTesA was developed to take the various technologies(XML Schema, RelaxNG, Schematron, etc.) that aid in conforming XML business rules and leveraging them to do what they do best. That developing rules becomes easier; better business rules mean easier specification adoption.